Why does the shielding range differ from what is described in the specification when the shield works?

The shielding range of the shielding device is related to the electromagnetic field at the shielding site and the distance from the communication base station. Generally 200 meters away from the best. The manufacturer is testing it under normal conditions, so the range of shielding will be slightly different. Jammers block radius distance is related to many factors, tall buildings in densely populated places may also lead to the scope of the interference has shrunk, the directions of interference radius is subject to a maximum radius of the commonly refers to the open, under the place without any interference to the distance.

If you're a teacher or student tired of other students typing on their phones during class, the mobile typist in class may be just what you need. With these devices, you can immediately stop talking, prevent students from cheating in exams, and stop class interruptions caused by ringing and ringing phones. The negative effects of mobile phones certainly outweigh research showing that long-term use tends to reduce attention. That's why education is often the main buyer of disruptive devices.

Mobile cellular signal gsm jammer is a device to prevent cell phones from receiving signals. The jammer is about the size of a box, slightly larger than the current smartphone, and has five antennas. To activate it, the man simply presses a button on the top of the device and all the nearby phones fall off. Just as parents have the ability and right to turn off WiFi at home, they should be able to turn off cellular signals if needed. Grabbing a phone from your hand and placing it in airplane mode may not work, and turning a house into a Faraday cage is the extreme behavior the hat-foil crowd should try. But home phone jammers should be an option if needed or needed. If the theater USES a jammer and kicks the second leg when the lights go dark, then concert audiences, Broadway buffs, moviegoers and many others don't have to worry about this rudeness. Of course, there is always an emergency, or a doctor on standby, or you have to make sure the caregiver has access to their parents. But these people should find another way to spend the night outside.